SPRD U2S Diag Driver is a critical software component that allows Windows 10 64-bit systems to communicate with mobile devices powered by Spreadtrum (UNISOC)
. It is primarily used for specialized diagnostic functions, firmware flashing, and performing device repairs or software updates. Key Features and Identification Driver Type: Appears under Ports (COM & LPT) in Device Manager once installed. Hardware IDs: Common IDs include USB\VID_1782&PID_4D00 USB\VID_0525&PID_A4A7 Common Version:
One of the most widely used stable versions for Windows 10 is 4.19.38.134 (released around 2020). Installation Guide for Windows 10 (64-Bit)
Installing these drivers often requires a few extra steps because they are frequently , which Windows 10 blocks by default.
The SPRD U2S Diag Driver is a essential software component for Windows PCs to communicate with mobile devices powered by Spreadtrum (now UNISOC) chipsets. This driver acts as a bridge, enabling critical operations like firmware flashing, diagnostic testing, and advanced device management. What is the SPRD U2S Diag Driver?
The "U2S Diag" (USB-to-Serial Diagnostic) driver is part of a package developed by UNISOC Communications Inc. (formerly Spreadtrum). It allows your computer to recognize a connected device as a functional COM port. This is particularly vital for budget smartphones and modules (like the EC200U series) that use SPRD processors. Key Functions & Use Cases SPRD U2S Diag - UNISOC Communications Inc. - DriverMax
The SPRD U2S Diag Driver is a essential software component for Windows 10 (64-bit) that enables communication between your PC and mobile devices using Spreadtrum (UNISOC) chipsets. It is primarily used for diagnostic functions, firmware flashing, and device management. Key Features and Usage
Device Recognition: Allows your computer to identify devices powered by Spreadtrum processors when connected via USB. Sprd U2s Diag Driver For Windows 10 64 Bit
Diagnostic Tools: Facilitates the use of diagnostic utilities for testing and repairs.
Firmware Management: Vital for flashing stock ROMs or updating device software.
Port Communication: Operates as a virtual COM port (e.g., COM3, COM15) for serial communication. How to Install on Windows 10 (64-bit)
Download the Driver: Obtain the 64-bit version of the SPRD U2S Diag driver from a reliable source like DriverMax or Treexy.
Run with Administrative Rights: Right-click the setup file and select "Run as administrator" to ensure proper installation.
Follow the Setup Wizard: Complete the installation steps provided by the wizard.
Manual Installation (if needed): If the installer fails, use Device Manager to "Add legacy hardware," then manually point to the extracted driver files. Restart: Reboot your PC to finalize the installation. Driver Specifications SPRD U2S Diag Driver is a critical software
Manufacturer: UNISOC Communications Inc. (formerly Spreadtrum). Common Hardware ID: USB/VID_1782&PID_5D29&MI_00.
Latest Version: Approximately v4.21.39.134 (released in late 2021).
Are you looking to use this driver for firmware flashing or general device repair? SPRD U2S Diag - UNISOC Communications Inc. - DriverMax
Cause: Windows installed its own generic serial driver.
Solution: Manually update driver as per Method 2. Force reinstall with Have Disk option.
The SPRD U2S Diag Driver is a USB driver package designed to allow Windows 10 (64-bit) to communicate with Unisoc/Spreadtrum-based smartphones, tablets, and IoT modules in Diagnostic (Diag) mode. This mode is essential for low-level tasks like:
Unlike MTP or ADB drivers, the U2S Diag driver exposes virtual COM ports (usually at COM3, COM4, etc.) that speak proprietary AT+ command sets and diagnostic protocols.
Because Spreadtrum chips lack the robust bootloader locking of Qualcomm or MediaTek, these drivers are often abused for unauthorized modifications. Flashing firmware (using tools like ResearchDownload or SPD
As of 2025, Unisoc (formerly Spreadtrum) has improved its driver signing. Newer chips (Unisoc Tiger T606, T618, etc.) use CDC Diag class drivers that are WHQL-signed. If you have a newer device, look for "Unisoc USB Diag Port" rather than "SPRD U2S." The legacy SPRD U2S name is still used for older chips like SC7731, SC9832, SC9850, and SC9863.
If you are working with a modern Unisoc phone (2022–present) and Windows 10 64-bit, try official Unisoc CDC drivers – they require no signature bypass.
| Feature | Specification |
| :--- | :--- |
| Developer | Spreadtrum Communications / Unisoc |
| Supported OS | Windows 10 (x64), also compatible with Win 7/8/11 (x64) |
| Driver Type | USB Device Driver (Virtual COM Port) |
| Hardware ID Examples | USB\VID_1782&PID_4D00 (Spreadtrum Generic) |
| Installation Format | Usually provided as an executable (.exe) or a manual folder for "Have Disk" installation. |
| Use Case | Mobile Software Repair, Network Calibration, Firmware Downgrades. |
The term breaks down as follows:
When you put your Spreadtrum-based Android device into Diagnostic Mode (often accessed via special key combinations or ADB commands), Windows 10 64-bit needs this driver to recognize the device as a usable COM port. Without it, the device will appear as an "unknown device" or with a yellow exclamation mark in Device Manager.
Target Platform: Windows 10 (64-bit Architecture) Primary Function: Establishes a software bridge between Spreadtrum/Unisoc chipsets and the Windows operating system for servicing and debugging.